Actor Satoshi Matsuda who had played Ren Akiyama / Kamen Rider Knight in Kamen Rider Ryuki had expressed his interest to reprise his role in Kamen Rider ZI-O in his Official Twitter.
About a year ago, Satoshi Matsuda was considered as a real Kamen Rider because of catching a thief in real world. He deserves a chance to appear in ZI-O because of this.
Translation of both the tweets.
"I want to appear in ZI-O"
"Only if there was offer"